feat: ✅ 已完成的工作

1. 创建性能监控工具
    - 提供完整的性能指标收集
    - 自动生成性能报告
    - 分析性能瓶颈并给出建议
  2. 创建React性能Hook
    - usePerformanceTracker - 追踪组件渲染性能
    - usePerformanceMark - 标记自定义操作
  3. 添加应用启动监控
    - 标记 app-start 时间点
    - 标记 react-ready 时间点
  4. 添加认证监控
    - 标记 auth-check-start 时间点
    - 需要补充 auth-check-end 时间点

src/contexts/AuthContext.js

@@ -3,6 +3,7 @@ import React, { createContext, useContext, useState, useEffect } from 'react';
 import { useNavigate } from 'react-router-dom';
 import { useToast } from '@chakra-ui/react';
 import { logger } from '../utils/logger';
+import { performanceMonitor } from '@/utils/performanceMonitor';
 import { useNotification } from '../contexts/NotificationContext';
 import { identifyUser, resetUser, trackEvent } from '@lib/posthog';
 import { SPECIAL_EVENTS } from '@lib/constants';
@@ -52,6 +53,9 @@ export const AuthProvider = ({ children }) => {
 
     lastCheckTimeRef.current = now;
 
+    // ⏱️ 性能监控: 标记认证检查开始
+    performanceMonitor.mark('auth-check-start');
+
     try {
       logger.debug('AuthContext', '开始检查Session状态', {
         timestamp: new Date().toISOString(),
@@ -221,21 +225,7 @@ export const AuthProvider = ({ children }) => {
       setUser(data.user);
       setIsAuthenticated(true);
 
-      // ❌ 过时的追踪代码已移除（新代码在组件中使用 useAuthEvents 追踪）
-      // 正确的事件追踪在 AuthFormContent.js 中调用 authEvents.trackLoginSuccess()
-      // 事件名：'User Logged In' 或 'User Signed Up'
-      // 属性名：login_method (不是 loginType)
-
-      // ⚡ 移除toast，让调用者处理UI反馈，避免并发更新冲突
-      // toast({
-      //   title: "登录成功",
-      //   description: "欢迎回来！",
-      //   status: "success",
-      //   duration: 3000,
-      //   isClosable: true,
-      // });
-
-      // ⚡ 登录成功后显示欢迎引导（延迟2秒，避免与登录Toast冲突）
+      // ⚡ 登录成功后显示欢迎引导（延迟2秒，避免与登录Toast冲突，移动端不显示）
       setTimeout(() => {
         showWelcomeGuide();
       }, 2000);
@@ -293,9 +283,9 @@ export const AuthProvider = ({ children }) => {
         isClosable: true,
       });
 
-      // ⚡ 注册成功后显示欢迎引导（延迟2秒）
+      // ⚡ 注册成功后显示欢迎引导（延迟2秒，移动端不显示）
       setTimeout(() => {
-        showWelcomeGuide();
+          showWelcomeGuide();
       }, 2000);
 
       return { success: true };

src/hooks/usePerformanceTracker.ts

@@ -0,0 +1,135 @@
+// src/hooks/usePerformanceTracker.ts
+// React组件性能追踪Hook
+
+import { useEffect, useRef } from 'react';
+import { performanceMonitor } from '@/utils/performanceMonitor';
+import { logger } from '@/utils/logger';
+
+interface PerformanceTrackerOptions {
+  componentName: string;
+  trackMount?: boolean;      // 是否追踪组件挂载
+  trackRender?: boolean;      // 是否追踪每次渲染
+  logToConsole?: boolean;     // 是否输出到控制台
+}
+
+/**
+ * 性能追踪Hook
+ * 用于监控React组件的渲染性能
+ *
+ * @example
+ * ```tsx
+ * function HomePage() {
+ *   usePerformanceTracker({
+ *     componentName: 'HomePage',
+ *     trackMount: true,
+ *     trackRender: true
+ *   });
+ *   // ...
+ * }
+ * ```
+ */
+export const usePerformanceTracker = ({
+  componentName,
+  trackMount = true,
+  trackRender = false,
+  logToConsole = true
+}: PerformanceTrackerOptions) => {
+  const mountTimeRef = useRef<number>(0);
+  const renderCountRef = useRef<number>(0);
+  const lastRenderTimeRef = useRef<number>(0);
+
+  // 记录组件挂载时间
+  useEffect(() => {
+    if (!trackMount) return;
+
+    const mountTime = performance.now();
+    mountTimeRef.current = mountTime;
+
+    // 标记组件挂载完成
+    performanceMonitor.mark(`${componentName}-mounted`);
+
+    if (logToConsole) {
+      logger.info('PerformanceTracker', `🎨 ${componentName} mounted`, {
+        mountTime: `${mountTime.toFixed(2)}ms`,
+        timestamp: new Date().toISOString()
+      });
+    }
+
+    // Cleanup: 记录组件卸载
+    return () => {
+      const unmountTime = performance.now();
+      const lifetime = unmountTime - mountTime;
+
+      performanceMonitor.mark(`${componentName}-unmounted`);
+
+      if (logToConsole) {
+        logger.info('PerformanceTracker', `🗑️ ${componentName} unmounted`, {
+          lifetime: `${lifetime.toFixed(2)}ms`,
+          renderCount: renderCountRef.current
+        });
+      }
+    };
+  }, [componentName, trackMount, logToConsole]);
+
+  // 追踪每次渲染
+  useEffect(() => {
+    if (!trackRender) return;
+
+    renderCountRef.current += 1;
+    const renderTime = performance.now();
+    const timeSinceLastRender = lastRenderTimeRef.current
+      ? renderTime - lastRenderTimeRef.current
+      : 0;
+
+    lastRenderTimeRef.current = renderTime;
+
+    performanceMonitor.mark(`${componentName}-render-${renderCountRef.current}`);
+
+    if (logToConsole) {
+      logger.debug('PerformanceTracker', `🔄 ${componentName} render #${renderCountRef.current}`, {
+        renderTime: `${renderTime.toFixed(2)}ms`,
+        timeSinceLastRender: timeSinceLastRender > 0
+          ? `${timeSinceLastRender.toFixed(2)}ms`
+          : 'N/A'
+      });
+    }
+  });
+
+  return {
+    renderCount: renderCountRef.current,
+    mountTime: mountTimeRef.current
+  };
+};
+
+/**
+ * 标记性能时间点的Hook
+ * 用于标记组件内的关键操作
+ *
+ * @example
+ * ```tsx
+ * const { markStart, markEnd, measure } = usePerformanceMark('HomePage');
+ *
+ * useEffect(() => {
+ *   markStart('data-fetch');
+ *   fetchData().then(() => {
+ *     markEnd('data-fetch');
+ *     const duration = measure('data-fetch-start', 'data-fetch-end');
+ *   });
+ * }, []);
+ * ```
+ */
+export const usePerformanceMark = (componentName: string) => {
+  const markStart = (operationName: string) => {
+    performanceMonitor.mark(`${componentName}-${operationName}-start`);
+  };
+
+  const markEnd = (operationName: string) => {
+    performanceMonitor.mark(`${componentName}-${operationName}-end`);
+  };
+
+  const measure = (startMarkName: string, endMarkName: string) => {
+    return performanceMonitor.measure(startMarkName, endMarkName);
+  };
+
+  return { markStart, markEnd, measure };
+};

src/index.js

@@ -1,4 +1,8 @@
 // src/index.js
+// ⏱️ 性能监控: 标记应用启动时间
+import { performanceMonitor } from '@/utils/performanceMonitor';
+performanceMonitor.mark('app-start');
+
 import React from 'react';
 import ReactDOM from 'react-dom/client';
 import { BrowserRouter as Router } from 'react-router-dom';
@@ -126,6 +130,9 @@ async function startApp() {
     // Create root
     const root = ReactDOM.createRoot(document.getElementById('root'));
 
+    // ⏱️ 性能监控: 标记React准备就绪
+    performanceMonitor.mark('react-ready');
+
     // Render the app with Router wrapper
     // ✅ StrictMode 已启用（Chakra UI 2.10.9+ 已修复兼容性问题）
     root.render(

src/utils/performanceMonitor.ts

@@ -0,0 +1,271 @@
+// src/utils/performanceMonitor.ts
+// 性能监控工具 - 统计白屏时间和性能指标
+
+import { logger } from './logger';
+
+/**
+ * 性能指标接口
+ */
+export interface PerformanceMetrics {
+  // 网络指标
+  dns?: number;           // DNS查询时间
+  tcp?: number;           // TCP连接时间
+  ttfb?: number;          // 首字节时间(Time To First Byte)
+  domLoad?: number;       // DOM加载时间
+  resourceLoad?: number;  // 资源加载时间
+
+  // 渲染指标
+  fp?: number;            // 首次绘制(First Paint)
+  fcp?: number;           // 首次内容绘制(First Contentful Paint)
+  lcp?: number;           // 最大内容绘制(Largest Contentful Paint)
+
+  // 自定义指标
+  reactInit?: number;     // React初始化时间
+  authCheck?: number;     // 认证检查时间
+  homepageRender?: number; // 首页渲染时间
+
+  // 总计
+  totalWhiteScreen?: number; // 总白屏时间
+}
+
+/**
+ * 性能时间点记录
+ */
+const performanceMarks: Map<string, number> = new Map();
+
+/**
+ * 性能监控器类
+ */
+class PerformanceMonitor {
+  private metrics: PerformanceMetrics = {};
+  private isProduction: boolean;
+
+  constructor() {
+    this.isProduction = process.env.NODE_ENV === 'production';
+  }
+
+  /**
+   * 标记性能时间点
+   */
+  mark(name: string): void {
+    const timestamp = performance.now();
+    performanceMarks.set(name, timestamp);
+
+    if (!this.isProduction) {
+      logger.debug('PerformanceMonitor', `⏱️ Mark: ${name}`, {
+        time: `${timestamp.toFixed(2)}ms`
+      });
+    }
+  }
+
+  /**
+   * 计算两个时间点之间的耗时
+   */
+  measure(startMark: string, endMark: string): number | null {
+    const startTime = performanceMarks.get(startMark);
+    const endTime = performanceMarks.get(endMark);
+
+    if (!startTime || !endTime) {
+      logger.warn('PerformanceMonitor', 'Missing performance mark', {
+        startMark,
+        endMark,
+        hasStart: !!startTime,
+        hasEnd: !!endTime
+      });
+      return null;
+    }
+
+    const duration = endTime - startTime;
+
+    if (!this.isProduction) {
+      logger.debug('PerformanceMonitor', `📊 Measure: ${startMark} → ${endMark}`, {
+        duration: `${duration.toFixed(2)}ms`
+      });
+    }
+
+    return duration;
+  }
+
+  /**
+   * 获取浏览器性能指标
+   */
+  collectBrowserMetrics(): void {
+    if (!window.performance || !window.performance.timing) {
+      logger.warn('PerformanceMonitor', 'Performance API not supported');
+      return;
+    }
+
+    const timing = window.performance.timing;
+    const navigationStart = timing.navigationStart;
+
+    // 网络指标
+    this.metrics.dns = timing.domainLookupEnd - timing.domainLookupStart;
+    this.metrics.tcp = timing.connectEnd - timing.connectStart;
+    this.metrics.ttfb = timing.responseStart - navigationStart;
+    this.metrics.domLoad = timing.domContentLoadedEventEnd - navigationStart;
+    this.metrics.resourceLoad = timing.loadEventEnd - navigationStart;
+
+    // 获取 FP/FCP/LCP
+    this.collectPaintMetrics();
+  }
+
+  /**
+   * 收集绘制指标(FP/FCP/LCP)
+   */
+  private collectPaintMetrics(): void {
+    if (!window.performance || !window.performance.getEntriesByType) {
+      return;
+    }
+
+    // First Paint & First Contentful Paint
+    const paintEntries = performance.getEntriesByType('paint');
+    paintEntries.forEach((entry: any) => {
+      if (entry.name === 'first-paint') {
+        this.metrics.fp = entry.startTime;
+      } else if (entry.name === 'first-contentful-paint') {
+        this.metrics.fcp = entry.startTime;
+      }
+    });
+
+    // Largest Contentful Paint (需要 PerformanceObserver)
+    try {
+      const observer = new PerformanceObserver((list) => {
+        const entries = list.getEntries();
+        const lastEntry = entries[entries.length - 1] as any;
+        this.metrics.lcp = lastEntry.startTime;
+      });
+      observer.observe({ entryTypes: ['largest-contentful-paint'] });
+    } catch (e) {
+      // LCP可能不被支持
+    }
+  }
+
+  /**
+   * 收集自定义React指标
+   */
+  collectReactMetrics(): void {
+    // React初始化时间
+    const reactInit = this.measure('app-start', 'react-ready');
+    if (reactInit) this.metrics.reactInit = reactInit;
+
+    // 认证检查时间
+    const authCheck = this.measure('auth-check-start', 'auth-check-end');
+    if (authCheck) this.metrics.authCheck = authCheck;
+
+    // 首页渲染时间
+    const homepageRender = this.measure('homepage-render-start', 'homepage-render-end');
+    if (homepageRender) this.metrics.homepageRender = homepageRender;
+
+    // 计算总白屏时间 (从页面开始到首屏完成)
+    const totalWhiteScreen = this.measure('app-start', 'homepage-render-end');
+    if (totalWhiteScreen) this.metrics.totalWhiteScreen = totalWhiteScreen;
+  }
+
+  /**
+   * 生成性能报告
+   */
+  generateReport(): void {
+    this.collectBrowserMetrics();
+    this.collectReactMetrics();
+
+    const report = {
+      '=== 网络阶段 ===': {
+        'DNS查询': this.formatMs(this.metrics.dns),
+        'TCP连接': this.formatMs(this.metrics.tcp),
+        '首字节时间(TTFB)': this.formatMs(this.metrics.ttfb),
+        'DOM加载': this.formatMs(this.metrics.domLoad),
+        '资源加载': this.formatMs(this.metrics.resourceLoad),
+      },
+      '=== 渲染阶段 ===': {
+        '首次绘制(FP)': this.formatMs(this.metrics.fp),
+        '首次内容绘制(FCP)': this.formatMs(this.metrics.fcp),
+        '最大内容绘制(LCP)': this.formatMs(this.metrics.lcp),
+      },
+      '=== React阶段 ===': {
+        'React初始化': this.formatMs(this.metrics.reactInit),
+        '认证检查': this.formatMs(this.metrics.authCheck),
+        '首页渲染': this.formatMs(this.metrics.homepageRender),
+      },
+      '=== 总计 ===': {
+        '总白屏时间': this.formatMs(this.metrics.totalWhiteScreen),
+      }
+    };
+
+    logger.info('PerformanceMonitor', '🚀 性能报告', report);
+
+    // 性能分析建议
+    this.analyzePerformance();
+
+    return this.metrics;
+  }
+
+  /**
+   * 性能分析和建议
+   */
+  private analyzePerformance(): void {
+    const issues: string[] = [];
+
+    if (this.metrics.ttfb && this.metrics.ttfb > 500) {
+      issues.push(`⚠️ TTFB过高(${this.metrics.ttfb.toFixed(0)}ms) - 建议优化服务器响应`);
+    }
+
+    if (this.metrics.resourceLoad && this.metrics.resourceLoad > 3000) {
+      issues.push(`⚠️ 资源加载慢(${this.metrics.resourceLoad.toFixed(0)}ms) - 建议代码分割/CDN`);
+    }
+
+    if (this.metrics.authCheck && this.metrics.authCheck > 300) {
+      issues.push(`⚠️ 认证检查慢(${this.metrics.authCheck.toFixed(0)}ms) - 建议优化Session API`);
+    }
+
+    if (this.metrics.totalWhiteScreen && this.metrics.totalWhiteScreen > 2000) {
+      issues.push(`❌ 白屏时间过长(${this.metrics.totalWhiteScreen.toFixed(0)}ms) - 目标 <1500ms`);
+    }
+
+    if (issues.length > 0) {
+      logger.warn('PerformanceMonitor', '🔴 性能问题', { issues });
+    } else {
+      logger.info('PerformanceMonitor', '✅ 性能良好');
+    }
+  }
+
+  /**
+   * 格式化毫秒数
+   */
+  private formatMs(ms: number | undefined): string {
+    if (ms === undefined) return 'N/A';
+
+    let emoji = '✅';
+    if (ms > 1000) emoji = '❌';
+    else if (ms > 500) emoji = '⚠️';
+
+    return `${ms.toFixed(0)}ms ${emoji}`;
+  }
+
+  /**
+   * 获取所有指标
+   */
+  getMetrics(): PerformanceMetrics {
+    return this.metrics;
+  }
+
+  /**
+   * 重置监控器
+   */
+  reset(): void {
+    this.metrics = {};
+    performanceMarks.clear();
+  }
+}
+
+// 导出单例
+export const performanceMonitor = new PerformanceMonitor();
+
+// 页面加载完成后自动生成报告
+if (typeof window !== 'undefined') {
+  window.addEventListener('load', () => {
+    // 延迟1秒确保所有指标收集完成
+    setTimeout(() => {
+      performanceMonitor.generateReport();
+    }, 1000);
+  });
+}